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-rw-r--r--src/zmq.cpp5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/zmq.cpp b/src/zmq.cpp
index ecb3d3d..fb7a7f9 100644
--- a/src/zmq.cpp
+++ b/src/zmq.cpp
@@ -230,7 +230,10 @@ size_t zmq_msg_size (zmq_msg_t *msg_)
// Reflect this in the API/ABI.
void *zmq_init (int /*app_threads_*/, int io_threads_, int /*flags_*/)
{
- // There are no context flags defined at the moment, so flags_ is ignored.
+ if (io_threads_ < 0) {
+ errno = EINVAL;
+ return NULL;
+ }
#if defined ZMQ_HAVE_OPENPGM
// Unfortunately, OpenPGM doesn't support refcounted init/shutdown, thus,